test_non_content_accessible_env_vars.html

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<!doctype html>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<iframe></iframe>

<iframe srcdoc="Foo"></iframe>

<script>

const NON_CONTENT_ACCESSIBLE_ENV_VARS = [

  "-moz-gtk-csd-titlebar-radius",

  "-moz-gtk-csd-minimize-button-position",

  "-moz-gtk-csd-maximize-button-position",

  "-moz-gtk-csd-close-button-position",

  "-moz-content-preferred-color-scheme",

  "-moz-overlay-scrollbar-fade-duration",

  "scrollbar-inline-size",

];

function testInWin(win) {

  let doc = win.document;

  const div = doc.createElement("div");

  doc.documentElement.appendChild(div);

  for (const envVar of NON_CONTENT_ACCESSIBLE_ENV_VARS) {

    div.style.setProperty("--foo", `env(${envVar},FALLBACK_VALUE)`);

    assert_equals(

      win.getComputedStyle(div).getPropertyValue("--foo"),

      "FALLBACK_VALUE",

      `${envVar} shouldn't be exposed to content in ${doc.documentURI}`

);

let t = async_test("Test non-content-accessible env() vars");

onload = t.step_func_done(function() {

  testInWin(window);

  for (let f of document.querySelectorAll("iframe")) {

    testInWin(f.contentWindow);

});

</script>